No , it seems like something was tripping. Strange as both PSU's were still spinning and active.

I was thinking i had maybe too much load one one PSU and in the end i've got like a criss cross power cabling going and with the revised power settings i seem to be happily getting just short of 1400 GH/s out of each of them and the power is quite happy.

It is a bit warm in here though which i know will not be an issue in their final destination.